Bug 346700

Summary: sddm crashes after boot
Product: [Plasma] plasmashell Reporter: basse <bastian.salmela>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: major CC: bshah, greg, nate, plasma-bugs
Priority: NOR Keywords: triaged
Version First Reported In: master   
Target Milestone: 1.0   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description basse 2015-04-26 10:27:45 UTC 
after booting sddm comes up only showing black background and white dialog telling about crash.

if I jump to console (ctrl-alt-f2) and do service restart sddm, it loads up nicely and I can login normally.

.b

Reproducible: Always

Steps to Reproduce:
1. boot
2. wait
3. observe

Actual Results:  
crash

Expected Results:  
show the GUI and let me login

Application: sddm-greeter (sddm-greeter), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f99e3edb780 (LWP 1469))]

Thread 3 (Thread 0x7f99d69d2700 (LWP 1470)):
#0  0x00007f99e1f7a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f99e3c41b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f99e3c4364f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f99d9a17099 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007f99e2811b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f99e15566aa in start_thread (arg=0x7f99d69d2700) at pthread_create.c:333
#6  0x00007f99e1f85eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f99d58dd700 (LWP 1511)):
#0  0x00007f99e1f7a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f99dfcf4ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f99dfcf4fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f99e2aa8c6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f99e2a4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f99e280cb44 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f99e34d7f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f99e2811b0e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f99e15566aa in start_thread (arg=0x7f99d58dd700) at pthread_create.c:333
#9  0x00007f99e1f85eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f99e3edb780 (LWP 1469)):
[KCrash Handler]
#6  0x00007f99e2dc3690 in QScreen::handle() const () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#7  0x00007f99d9a2b545 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#8  0x00007f99d9a185c1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#9  0x00007f99e2da1786 in QWindowPrivate::create(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007f99e2da4678 in QWindow::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x0000000000421bf4 in SDDM::GreeterApp::show() ()
#12 0x00007f99e2a809c9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x0000000000428a80 in SDDM::ScreenModel::initScreens(bool) ()
#14 0x0000000000428c67 in SDDM::ScreenModel::onScreenAdded(QScreen*) ()
#15 0x00007f99e2a809c9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f99e2d92c52 in QGuiApplication::screenAdded(QScreen*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007f99d9a1544f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#18 0x00007f99d9a1627d in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#19 0x00007f99d9a174bb in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#20 0x00007f99e2a8173a in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f99e2a4faf5 in QCoreApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f99e2a4fc2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f99e2a51c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007f99e2aa8843 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f99dfcf4c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f99dfcf4f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f99dfcf4fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f99e2aa8c57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f99e2a4d3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f99e2a5502c in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00000000004111b7 in main ()
Comment 1 David Edmundson 2015-04-26 17:06:52 UTC 
What graphic card do you have?
Comment 2 basse 2015-04-27 07:39:59 UTC 
nvidia card.  NVIDIA Corporation GM108M [GeForce 840M] (rev a2)

.b
Comment 3 Greg Lepore 2015-10-12 16:09:58 UTC 
Not sure if I'm getting the same crash:

lepore@lepore-desktop:~$ dmesg | grep sddm
[    6.489948] sddm[913]: segfault at 4 ip b6d2e7b2 sp bf9faef0 error 4 in libQt5Core.so.5.4.2[b6bac000+4b2000]
[    7.739175] sddm[980]: segfault at 4 ip b6d337b2 sp bfd78020 error 4 in libQt5Core.so.5.4.2[b6bb1000+4b2000]
[    9.194876] sddm[1014]: segfault at 4 ip b6d4a7b2 sp bfcc5e10 error 4 in libQt5Core.so.5.4.2[b6bc8000+4b2000]
[   10.570414] sddm[1109]: segfault at 4 ip b6d3e7b2 sp bfbd6e50 error 4 in libQt5Core.so.5.4.2[b6bbc000+4b2000]
[   11.653598] sddm[1143]: segfault at 4 ip b6c7f7b2 sp bfa9a220 error 4 in libQt5Core.so.5.4.2[b6afd000+4b2000]

I get dumped to a console and have to run startx to get a GUI.

Graphics card is a NVIDIA Corporation G96 [GeForce 9400 GT]. I tried switching from the Nouveau drivers to the proprietary ones, but still got the crash.
Comment 4 Andrew Crouthamel 2018-09-25 21:52:03 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days, the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please set the bug status as REPORTED so that the KDE team knows that the bug is ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 5 Andrew Crouthamel 2018-10-27 03:35:50 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!
Comment 6 Nate Graham 2021-02-08 19:25:30 UTC 

*** This bug has been marked as a duplicate of bug 341497 ***